Air conditioning system for cars



Nov. 23, 1937. F. L. MURPHY AIR CONDITIONING SYSTEM FOR CARS Filed Feb. 19, 1934 5 SheetsSheet 1 A m n I a a a u m n 1 n u a a. y G u Nov. 23, 1937. v L F- Y 2,099,702

AIR CONDITIONING SYSTEM FOR CARS Fil ed Feb. 19, l934 3 Sheets-Sheet 2 Nov. 23, 1937. F. MURPHY 2,099,702

AIR CONDITIONING SYSTEM FOR CARS Filed Feb. 19, 1934 3 Sheets-Sheet 3 b Ina/euro? Patented Nov. 23, 1937 I UNITED STATES PATENT. OFFICE AIR, CONDITIONING SYSTEM FOR CARS Y Frank L. Murphy, Chicago, Ill., assignor to Full man-Standard Car Manufacturing Company, Chicago, 11]., a corporation of Delaware Application February 19, 1934, Serial No. 711,858 1 Claim. (Cl. 98-4) The principal object of this invention is to fit forms ID are separated by doors H from passageair conditioning apparatus to available space in ways l2 between the water closets l3 and the passenger cars and provide more uniform condiadjacent lockers l4 and extending alongside the tions in the passenger space than has heretofore lavatories l5. Next to the lavatory at the right 5 been obtained. end a drawing-room I6 is also indicated. This Generally speaking, this is accomplished by comes as near a conventional sleeping car plan making two conditioning devices, or units, of as can be found. about half the capacity required, and mounting Each unit or group in the separate air condione overhead in each passageway adjacent to the tioning apparatus located in the passageway I2 end of the car and having it deliver through a is indicated at H, connected with a duct l8 run- 10 duct running substantially throughout the length ning along inside the clearstory, or side deck of of the passenger space and overlapping the duct the roof, to the wall of the water closet at the of the other unit. opposite end of the car.

Smaller blowers, coolers, casings, etc., can be In Figs. 2, 3 and 4, the apparatus is shown used in each unit or group, and thus be more more in detail where it will be seen that there is 15 easily accommodated overhead and in space not a casing 4| generally rectangular in form, susrequired for other purposes. And, by delivering pended from two carlines l9 by bolts and the air from each end throughout the length of inverted channels 2|. the passenger space, the decline in efficiency in One end 22 of the casing is open to admit the 20 each apparatus as the distance to the point of air to be conditioned and the otherend is drawn 20 delivery increases, is offset by the more favorable down at 23 to connect with the inlet 24 of 8.- conditions in the opposed apparatus. If there is a centrifugal blower 25, driven by a belt 26 from drop in temperature, or pressure, towards the an electric motor 21 carried by a bracket 28 fixed remote end of one delivery duct the deficiency is to the casing. 5 made up by the better temperature and pressure The casing is fitted with a filter 29, a cooler 30 obtaining in the other duct in that area. and a heater 3| of suitable form and kind, de-

Only half the returned air being taken from pending on the conditions. As a rule'a filter each passageway there is no appreciable draft and space 20 x 4 x 24" will be sufflcient, a heater the noise is reduced to a negligible quantity. space 17 x 2" x 15 will be sufficient and a When the load is light, one unit alone is suificooler space 17 /2" x 9" x 24" will be suflicient. 30 cient to carry it. An inlet for fresh air is made by cutting open- Ot e objects a d v a e of the i vention ings through the vestibule ceiling 32 and the end will appear as the disclosure proceeds and the wall sheathing 33. The vestibule chamber will description is read in connection with the acthen become a settling space to remove a large 35 companying drawings, in which portion of entrained solids and thereby relieve 35 Fig. 1 is a diagrammatic plan view of a sleepthe filter. ing car equipped according to this invention; The space above the vestibule ceiling can also Fig. 2 is a transverse section adjacent to one be used for settling, or duct tubing 31 may be end of the car showing the apparatus located fitted in to connect the opening through the vesoverhead in the passageway andmasked by a tibule ceiling to the opening through the end 40 false ceiling; wall sheathing 33 and thereby deliver the fresh Fig. 3 is a plan section looking downward on the air "into the upper part of the passageway.

apparatus at one end of the car with the roof The apparatus in the passageway is masked by removed; inserting a false ceiling 35 above the door and Fig. 4 is a longitudinal section through the roof secured to the walls surrounding the passageway. 45 portion at one end of the car showing the loca- An inlet for returned air from the passenger space tion of the apparatus; is provided by an opening 36 in the false ceiling Fig. 5 is a diagrammatic plan view similar to and a part of this opening may also be used to Fig. 1, illustrating an alternative arrangement for reach the filter for cleaning and replacing.

use when the delivery ducts are on the outside on A liquid refrigerant may be supplied to the 50 the lower deck of the monitor roof; cooler through pipes 3! brought up through the Fig. 6 is a transverse section through a car so locker M from beneath the car where mechanequipped, the left side and the lower portion being ical refrigeration or ice bunkers are located. The broken away. coolers at each end may be supplied from the In the plan view of Fig. 1, the vestibule platsame or separate refrigerating apparatus. Vapor s5 pipes 39, coming up through the locker from the train pipe below.

Each blower 25 is flexibly connected at 40 with a delivery duct 18 extendng through all partition 'walls to the closet wall at the opposite end of the car, and provided with slots or louvres 38 suitably spaced throughout its length, to promote mixing andprevent back pressure.

The proportions of outside and returned air may be varied and regulated by providing adjustable shutters, or valves, at the inlets to be controlled manually, or automatically, as desired.

In Fig. 5 thecasings 4| are turned through 90 to make the blower 25 deliver crosswise to= the car towardsthe outside ducts 42, which as indicated in Fig. 6, are built against the deck, sides 43 and supported on the lower decks 44. Where the outlet of the blower joins the ducts 42, directing fans 45 are inserted to assist in turning the current of air from crosswise to lengthwise of the car. Being outside it is necessary to provide the ducts with generous insulation 46, cov ered with suitable weather proofing 47.

I claim as my invention:

or steam may be supplied to the heater through In a passenger car having an interior passenger space and a roof therefor, a false ceiling for the upper'part oi! said space at each end portion of the car forming a pair of chambers, an air conditioning device in each of said chambers, both devices being capable of continuous, simultaneous operation, each device comprising a cooler and. blower removably supported as a unit from the roof by securing means accessible from below the unit and each unit being of relatively small size, having a capacity less than the normal requirements of the car, the capacity of both units, taken together being suihcient for said normal requirements, each false ceiling being apertured for admitting to the adjacent chamber air from, the passengerspac'e and being removable to permit insertion and removal of the unit in said J chamber by manipulation of said securing means,

a duct extending from-each device toward the other having openings for discharging condi- LMURPHY. 

